Micrometer device



Dec; 6, 1966 G. J. WOLGA MICROMETER DEVICE Filed Nov. 2, 1964 INVENTOR Qzuea LueL n BY ,ewu zw z W ATTORNEX United States Patent 3,289,311 MICROMETER DEVICE George .1. Wolga, 336 Snyder Hill Road, RD. 2, Ithaca, NIY. Filed Nov. 2, 1964, Ser. No. 408,010 2 Claims. (Cl. 33-474) The invention relates to a micrometer device, and more particularly to such a device for controlling the position of a member mounted in gimbals, such as a mirror or lens.

It is difficult to connect a micrometer barrel to a lever or pivotably mounted object in such a way that the motion of the barrel is transmitted exactly to the lever, without play and without substantial danger of wear and frictional resistance.

The objects of the present invention is to provide a micrometer device in which motion is transmitted accurately, without substantial wear and without play, and resettably, in a simple and inexpensive yet effective manner.

More particularly, the invention contemplates an arrangement in which either the lever or the micrometer barrel or both has a rounded portion, which is engageable with a permanent magnet having a fiat or curved face secured to the other member.

Further objects and advantages of the invention will appear more fully from the following description, particularly when taken in conjunction with the accompanying drawings which form a part thereof.

In the drawings:

FIG. 1 shows in plain view an embodiment of the invention;

FIG. 2 is an end view thereof;

FIG. 3 is a side of a portion of the device; and

FIG. 4 shows a part of a modification.

FIG. 1 shows a gimbal mounting for an element, such as for example a mirror 2. This mirror is mounted in a ring 4 which is itself mounted by pivots 6 in a ring 8. Ring 8 is mounted by pivots 10 in the sidewalls of a frame 12.

The mirror-carrying ring 4 has an extension 14 at a point 90 around its periphery from the axis of 6. This extension 14 carries a permanent magnet 16, which engages With the rounded end 18 of a micrometer barrel 20 mounted in a crosswall 22 of the frame and operable by a handle 24.

Likewise, ring 8 has an extension 26 located at 90 around its periphery from the axis 10, and having a magnet 28 engageable with the rounded end 30 of the barrel 32 of a micrometer which is operated by a handle 34. This micrometer is also located in Wall 22.

With such an arrangement, the mirror or other device carried in ring 4 will follow at all times the movements of the barrels of the two micrometers with accuracy, resettably and without any substantial wear. Almost all play is avoided.

It will be obvious that the projection 14 of the ring 4 constitutes in effect a lever pivoted at 6.

While the heads of the micrometer barrels are shown as being hemispherical, they could have a different curva:

ture if desired. Theydo however have radii of curvature about at least one axis perpendicular to the longitudinal axis of the barrel.

The parts may be reversed as shown in FIG. 4 in which a micrometer barrel 36 carries on its end a flat magnet 38 engaging a rounded part 40 on the end of a lever 42 pivoted at 44.

While I have described herein some embodiments of my invention, 1 wish it to be understood that I do not intend to limit myself thereby except within the scope of the claims hereto or hereinafter appended.

I claim:

1. In combination, a frame, a member mounted in said frame to turn about an axis, a second member mounted in said first member to turn about an axis perpendicular to the axis of said first member, each of said members having a part projecting therefrom at a point from the axis about which it is mounted to turn, a pair of actuating members, means mounting said members in said frame for longitudinal movement, said mounting means including means for fine adjustment of the members with respect to the frame, each member having an end part, the path of movement of each of such end parts intercepting one of said projecting parts, said parts normally engaging each other, one each of said projecting parts and end parts having a permanent magnet engageable with the other part, and one of said projecting part and end part being rounded about at least one axis perpendicular to the longitudinal axis of the member.

2. In combination, a frame, a member mounted in said frame to turn about an axis, a second member mounted in said first member to turn about an axis perpendicular to the axis of said first member, each of said members having a projecting part therefrom at a point 90 from the axis about which it is mounted to turn, a pair of actuating members, means mounting said members in said frame for longitudinal movement, said mounting means including means for fine adjustment of the members with respect to the frame, each member having an end part, the path of movement of each of such end parts intercepting one of said projecting parts, said parts normally engaging each other, each of said projecting parts having a permanent magnet engageable with the end part, and each of said projecting parts being substantially fiat surfaced and each of said end parts being rounded about at least one axis perpendicular to the longitudinal axis of the member.

References (Iited by the Examiner UNITED STATES PATENTS 1,799,604 4/1931 Read 1814 1,916,609 7/1933 Emmons 88-14 2,430,969 11/1947 Young 25051.5 2,636,278 4/1953 Krause Q 33 2,791,836 5/1957 Gerber 33 3,085,345 4/1963 Pearson 33-174 3,086,112 4/1963 Riecke 250-49.5 3,195,238 7/1965 Grenell 33-474 Primary Examiner. 

1. IN COMBINATION, A FRAME, A MEMBER MOUNTED IN SAID FRAME TO TURN ABOUT AN AXIS, A SECOND MEMBER MOUNTED IN SAID FIRST MEMBER TO TURN ABOUT AN AXIS PERPENDICULAR TO THE AXIS OF SAID FIRST MEMBER, EACH OF SAID MEMBERS HAVING A PART PROJECTING THEREFROM AT A POINT 90* FROM THE AXIS ABOUT WHICH IT IS MOUNTED TO TURN, A PAIR OF ACTUATING MEMBERS, MEANS MOUNTING SAID MEMBERS IN SAID FRAME FOR LONGITUDINAL MOVEMENT, SAID MOUNTING MEANS INCLUDING MEANS FOR FINE ADJUSTMENT OF THE MEMBERS WITH RESPECT TO THE FRAME, EACH MEMBER HAVING AN END PART, THE PATH OF MOVEMENT OF EACH OF SUCH END PARTS INTERCEPTING ONE OF SAID PROJECTING PARTS, SAID PARTS NORMALLY ENGAGING EACH OTHER, ONE EACH OF SAID PROJECTING PARTS AND END PARTS HAVING A PERMANENT MAGNET ENGAGEABLE WITH THE OTHER PART, AND ONE OF SAID PROJECTING PART AND END PART BEING ROUNDED ABOUT AT LEAST ONE AXIS PREDENDICULAR TO THE LONGITUDINAL AXIS OF THE MEMBER. 